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TECHNICAL PAPERS: Heat Transfer Enhancement

Forced Convection Heat Transfer Enhancement Using a Self-Oscillating Impinging Planar Jet

[+] Author and Article Information
Cengiz Camci, Frank Herr

Turbomachinery Heat Transfer Laboratory, The Pennsylvania State University, Department of Aerospace Engineering, 223 Hammond Building, University Park, PA 16802

J. Heat Transfer 124(4), 770-782 (Jul 16, 2002) (13 pages) doi:10.1115/1.1471521 History: Received June 30, 2000; Revised February 15, 2002; Online July 16, 2002
Copyright © 2002 by ASME
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References

Figures

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A planar jet with self-sustained oscillations
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Geometrical details of the nozzle and the experimental setup for the self-oscillating impinging jet experiments
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Heat transfer surface construction
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Effect of nozzle throat width and communicating tube length on oscillation frequency of the jet, (ϕ=20 deg)
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Axial, lateral mean velocity profiles and Reynolds stresses in oscillating jet
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Stationary jet Nusselt number distributions on impingement plate, influence of Reynolds number and impingement plate location x/d, baseline data set
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Impingement plate heat transfer distribution from stationary jet, Nu/Re−0.56 distribution for all Reynolds numbers in function of y/d
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Self-oscillating-jet Nusselt number distributions on impingement plate, influence of Reynolds number and impingement plate location x/d
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Impingement plate heat transfer distribution from oscillating jet, Nu/Re−0.50 distribution for all Reynolds numbers in function of y/d
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Comparison of oscillating jet and stationary jet heat transfer distributions on the impingement plate, Re=7500
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Comparison of oscillating jet and stationary jet heat transfer distributions on the impingement plate, Re=10,000
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Comparison of oscillating jet and stationary jet heat transfer distributions on the impingement plate, Re=14,000
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Stagnation line heat transfer at various nozzle to impingement plate distances, without and with jet oscillations

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